JP Enterprises JP-5 Lock Piece — 90°

90° Roller Bearing Angle · Proprietary Steel · Nitride Finish · JP-5 / MP5 Pattern · SKU: JP5-LP90 The JP Enterprises JP-5 90° Lock Piece is an interchangeable roller bearing component for tuning the recoil impulse of the JP-5 roller-delayed platform. Proprietary steel with nitride coating for low wear and low friction. The 90° angle is the highest available—recommended when the action cycles weakly or unreliably, or when running low-pressure ammunition such as light hand loads. Compatible with H&K MP5 and MP5 clones that accept H&K lock pieces. Validate bolt gap after installation.

90° — Highest Angle

The 90° lock piece requires the least force to open the action. Recommended for systems experiencing weak or unreliable cycling, or when decreasing system pressure through shorter barrels, removing suppressors, or switching to lower-pressure ammunition.

Proprietary Steel with Nitride Finish

Manufactured from proprietary steel with nitride coating for low wear and low friction throughout the service life of the component.

MP5 Platform Compatibility

Compatible with JP-5 and H&K MP5. Compatible with MP5 clones that accept H&K lock pieces—not all MP5 clones are compatible. Validate bolt gap after installation as lock piece geometry may alter bolt gap.

Specifications:

• Manufacturer: JP Enterprises
• Model: JP-5 Lock Piece
• SKU: JP5-LP90
• Angle: 90°
• Material: Proprietary Steel
• Finish: Nitride
• Platform: JP-5, H&K MP5, Compatible MP5 Clones
• Application: Higher angle — weak cycling, low pressure loads